DS89C420-ENL MAXIM [Maxim Integrated Products], DS89C420-ENL Datasheet - Page 45

• Manufacturer Part Number: DS89C420-ENL
• Description: Ultra-High-Speed Microcontroller
• Manufacturer: MAXIM [Maxim Integrated Products]

NOTES:
1) Specifications to -40°C are guaranteed by design and not production tested.
2) All voltages are referenced to ground.
3) Active current is measured with a 33MHz clock source driving XTAL1, V
4) Idle mode current measured with a 33MHz clock source driving XTAL1, V
5) Stop mode measured with XTAL and RST grounded, V
6) When addressing external memory.
7) RST = 5.5V. This condition mimics the operation of pins in I/O mode.
8) During a 0-to-1 transition, a one-shot drives the ports hard for two clock cycles. This measurement
9) Ports 1, 2, and 3 source transition current when being pulled down externally. The current reaches its
10) This port is a weak address holding latch in bus mode. Peak current occurs near the input transition
11) RST = 5.5V. Port 0 floating during reset and when in the logic- high state during I/O mode.
12) While the specifications for V
13) The user should note that this part is tested and guaranteed to operate down to 4.5V (10%) and that
14) Guaranteed by design.
pins disconnected.
All other pins disconnected.
reflects a port pin in transition mode.
maximum at approximately 2V.
point of the holding latch at approximately 2V.
is not possible. Within the ranges given, there is a guaranteed separation between these two voltages.
V
(min)] where the processor’s operation is not guaranteed, but the reset trip point has not been reached.
This should not be an issue in most applications, but should be considered when proper operation
must be maintained at all times. For these applications, it may be desirable to use a more accurate
external reset.
RST
(min) is specified below that point. This indicates that there is a range of voltages [V
PFW
and V
RST
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overlap, the design of the hardware makes it such that this
CC
= 5.5V. All other pins disconnected.
CC
CC
= RST = 5.5V. All other
= 5.5V, RST at ground.
MIN
DS89C420
to V
RST